GCP Java - 1.0

package com.example.bigtable;

import com.google.cloud.bigtable.data.v2.BigtableDataClient;
import com.google.cloud.bigtable.data.v2.models.ReadModifyWriteRow;
import com.google.cloud.bigtable.data.v2.models.Row;
import java.nio.charset.Charset;

public class WriteIncrement {
  private static final String COLUMN_FAMILY_NAME = "stats_summary";

  public static void writeIncrement(String projectId, String instanceId, String tableId) {
    String projectId = "my-project-id";
    String instanceId = "my-instance-id";
    String tableId = "mobile-time-series";

    try (BigtableDataClient dataClient = BigtableDataClient.create(projectId, instanceId)) {
		
      String rowkey = "phone#4c410523#20190501";
      ReadModifyWriteRow mutation =
          ReadModifyWriteRow.create(tableId, rowkey)
              .increment(COLUMN_FAMILY_NAME, "connected_cell", -1);
      Row success = dataClient.readModifyWriteRow(mutation);

      System.out.printf(
          "Successfully updated row %s", success.getKey().toString(Charset.defaultCharset()));
    } catch (Exception e) {
      System.out.println("Error during WriteIncrement: \n" + e.toString());
    }
  }
}

package com.example.storage.object;

import com.google.cloud.storage.BlobId;
import com.google.cloud.storage.Storage;
import com.google.cloud.storage.StorageOptions;
import java.util.LinkedList;
import java.util.List;

public class DeleteOldVersionOfObject {

public static void deleteOverloadedOne(String projectId, String bucketName, String objectName, long generationToDelete){
    bucketName = "my-delete-bucket-o1";
    String blobName1 = "my-blob-name1";
    String blobName2 = "my-blob-name2";
    Storage storage = StorageOptions.newBuilder().setProjectId(projectId).build().getService();
    BlobId firstBlob = BlobId.of(bucketName, blobName1);
    BlobId secondBlob = BlobId.of(bucketName, blobName2);
    storage.delete(firstBlob, secondBlob);
  }
}

import com.google.api.core.ApiFuture;
import com.google.cloud.pubsub.v1.Publisher;
import com.google.protobuf.ByteString;
import com.google.pubsub.v1.PubsubMessage;
import com.google.pubsub.v1.TopicName;
import java.io.IOException;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.TimeUnit;

public class PublisherExample {
  public static void main(String... args) throws Exception {
    String projectId = "your-project-id";
    String topicId = "topic_id_01";
    publisherExample(projectId, topicId);
  }
  public static void publisherExample(String projectId, String topicId)
      throws IOException, ExecutionException, InterruptedException {
    TopicName topicName = TopicName.of(projectId, topicId);

    Publisher publisher = null;
    try {
      publisher = Publisher.newBuilder(topicName).build();
      String message = "Hello World!";
      ByteString data = ByteString.copyFromUtf8(message);
      PubsubMessage pubsubMessage = PubsubMessage.newBuilder().setData(data).build();
      ApiFuture<String> messageIdFuture = publisher.publish(pubsubMessage);
    } finally {
      if (publisher != null) {
        publisher.shutdown();
        publisher.awaitTermination(1, TimeUnit.MINUTES);
      }
    }
  }
}

import com.google.cloud.pubsub.v1.SubscriptionAdminClient;
import com.google.pubsub.v1.PushConfig;
import com.google.pubsub.v1.Subscription;
import com.google.pubsub.v1.SubscriptionName;
import com.google.pubsub.v1.TopicName;
import java.io.IOException;

public class CreatePullSubscriptionExample {
  public static void main(String... args) throws Exception {
    String projectId = "your-project-id";
    String subscriptionId = "subscription_id_01";
    String topicId = "topic_id_01";
    createPullSubscriptionExample(projectId, subscriptionId, topicId);
  }
  public static void createPullSubscriptionExample(
      String projectId, String subscriptionId, String topicId) throws IOException {
    try (SubscriptionAdminClient subscriptionAdminClient = SubscriptionAdminClient.create()) {
      TopicName topicName = TopicName.of(projectId, topicId);
      SubscriptionName subscriptionName = SubscriptionName.of(projectId, subscriptionId);
      Subscription subscription =
          subscriptionAdminClient.createSubscription(
              subscriptionName, topicName, PushConfig.getDefaultInstance(), 10);
      System.out.println("Created pull subscription: " + subscription.getName());
    }
  }
}

import com.google.cloud.pubsub.v1.AckReplyConsumer;
import com.google.cloud.pubsub.v1.MessageReceiver;
import com.google.cloud.pubsub.v1.Subscriber;
import com.google.pubsub.v1.ProjectSubscriptionName;
import com.google.pubsub.v1.PubsubMessage;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.TimeoutException;

public class SubscribeAsyncExample {
  public static void main(String... args) throws Exception {
    String projectId = "your-project-id";
    String subscriptionId = "subscription_id_01";
    subscribeAsyncExample(projectId, subscriptionId);
  }
  public static void subscribeAsyncExample(String projectId, String subscriptionId) {
    ProjectSubscriptionName subscriptionName =
        ProjectSubscriptionName.of(projectId, subscriptionId);
    MessageReceiver receiver =
        (PubsubMessage message, AckReplyConsumer consumer) -> {
          consumer.ack();
        };
    Subscriber subscriber = null;
    try {
      subscriber = Subscriber.newBuilder(subscriptionName, receiver).build();
      subscriber.startAsync().awaitRunning();
      subscriber.awaitTerminated(30, TimeUnit.SECONDS);
    } catch (TimeoutException timeoutException) {
      subscriber.stopAsync();
    }
  }
}